import "./App.css";
import { AppProvider, useApp } from "./context/AppContext.jsx";
import { useEffect, useRef, useState } from "react";
import LoginPage from "./components/LoginPage.jsx";
import NavBar from "./components/NavBar.jsx";
import GebruikersBeheer from "./components/GebruikersBeheer.jsx";
import DashboardTab from "./pages/DashboardTab.jsx";
import EigenVermogenTab from "./pages/EigenVermogenTab.jsx";
import SchuldTab from "./pages/SchuldTab.jsx";
import VoortgangTab from "./pages/VoortgangTab.jsx";
import { RED, PURPLE_LIGHT } from "./constants/index.js";
import { fmt } from "./utils/format.js";
import { version } from "./version.js";
import { useUpdateCheck } from "./hooks/useUpdateCheck.js";
import ProfielPopup from "./components/ProfielPopup.jsx";
import InstellingenModal from "./components/InstellingenModal.jsx";

function initials(naam = "") {
  const parts = naam.trim().split(/\s+/);
  if (parts.length >= 2) return (parts[0][0] + parts[parts.length - 1][0]).toUpperCase();
  return naam.slice(0, 2).toUpperCase();
}

const PAGES = [DashboardTab, EigenVermogenTab, SchuldTab, VoortgangTab];

function AppInner() {
  const { loggedIn, login, logout, locked, tab, showUsers, setShowUsers, showInstellingen, setShowInstellingen, loading, T, currentUser, avatar, idleMinutes, totEV } = useApp();
  const [profielOpen,  setProfielOpen]  = useState(false);
  const [searchOpen,   setSearchOpen]   = useState(false);
  const nieuweVersie = useUpdateCheck();   // { latest, naam, notes, url } of null
  const [bellOpen,     setBellOpen]     = useState(false);
  const searchRef = useRef(null);

  const idleTimer = useRef(null);
  const IDLE_MS = (idleMinutes ?? 30) * 60 * 1000;
  const [sessionVerlopen, setSessionVerlopen] = useState(false);

  useEffect(() => {
    if (!loggedIn) return;
    const reset = () => {
      clearTimeout(idleTimer.current);
      idleTimer.current = setTimeout(() => {
        logout();
        setSessionVerlopen(true);
      }, IDLE_MS);
    };
    const events = ["mousemove", "mousedown", "keydown", "touchstart", "scroll"];
    events.forEach((e) => window.addEventListener(e, reset, { passive: true }));
    reset();
    return () => {
      events.forEach((e) => window.removeEventListener(e, reset));
      clearTimeout(idleTimer.current);
    };
  }, [loggedIn]);

  useEffect(() => {
    const handler = (e) => {
      if ((e.metaKey || e.ctrlKey) && e.key === "k") {
        e.preventDefault();
        setSearchOpen(true);
        setTimeout(() => searchRef.current?.focus(), 50);
      }
      if (e.key === "Escape") setSearchOpen(false);
    };
    window.addEventListener("keydown", handler);
    return () => window.removeEventListener("keydown", handler);
  }, []);

  if (!loggedIn) {
    if (sessionVerlopen) {
      return (
        <div style={{
          minHeight: "100vh", background: T.bg, color: T.text,
          display: "flex", alignItems: "center", justifyContent: "center",
          fontFamily: "'Inter', system-ui, sans-serif",
        }}>
          <div style={{
            background: T.card, border: `1px solid ${T.border}`,
            borderRadius: 20, padding: "40px 36px", maxWidth: 360, width: "100%",
            textAlign: "center", boxShadow: "0 16px 48px rgba(0,0,0,0.4)",
          }}>
            <div style={{ fontSize: 52, marginBottom: 16 }}>⏱</div>
            <div style={{ fontSize: 20, fontWeight: 800, marginBottom: 10 }}>Sessie verlopen</div>
            <div style={{ fontSize: 14, color: T.muted, marginBottom: 28, lineHeight: 1.6 }}>
              Je bent automatisch uitgelogd na 30 minuten inactiviteit. Klik hieronder om opnieuw in te loggen.
            </div>
            <button onClick={() => { setSessionVerlopen(false); }} style={{
              width: "100%", padding: "14px",
              background: "linear-gradient(135deg, #8b5cf6, #a855f7)",
              border: "none", borderRadius: 12,
              color: "#fff", fontWeight: 700, fontSize: 15, cursor: "pointer",
              boxShadow: "0 4px 16px rgba(139,92,246,0.4)",
            }}>
              Opnieuw inloggen
            </button>
          </div>
        </div>
      );
    }
    return <LoginPage onLogin={login} />;
  }

  if (loading) {
    return (
      <div style={{
        minHeight: "100vh", background: T.bg, color: T.text,
        display: "flex", alignItems: "center", justifyContent: "center",
        flexDirection: "column", gap: 16,
        fontFamily: "'Inter', system-ui, sans-serif",
      }}>
        <div style={{
          width: 40, height: 40, borderRadius: "50%",
          border: `3px solid rgba(139,92,246,0.2)`,
          borderTop: `3px solid ${PURPLE_LIGHT}`,
          animation: "spin 0.8s linear infinite",
        }} />
        <style>{`@keyframes spin { to { transform: rotate(360deg); } }`}</style>
        <div style={{ color: T.muted, fontSize: 14 }}>Data laden…</div>
      </div>
    );
  }

  const ActivePage = PAGES[tab] ?? DashboardTab;

  return (
    <div style={{ display: "flex", minHeight: "100vh", background: T.bg, color: T.text, fontFamily: T.font }}>
      <style>{`
        * { box-sizing: border-box; }
        input[type=number]::-webkit-inner-spin-button { opacity: 0.4; }
        ::-webkit-scrollbar { width: 6px; height: 6px; }
        ::-webkit-scrollbar-track { background: transparent; }
        ::-webkit-scrollbar-thumb { background: rgba(128,128,128,0.2); border-radius: 99px; }
        ::-webkit-scrollbar-thumb:hover { background: rgba(128,128,128,0.35); }
      `}</style>

      <NavBar />

      {/* Hoofdinhoud */}
      <div style={{ flex: 1, overflowY: "auto", maxHeight: "100vh", background: T.contentBg ?? T.bg }}>
        {/* Topbalk */}
        <div style={{
          display: "flex", alignItems: "center", gap: 12,
          padding: "10px 24px",
          background: T.bg,
          position: "sticky", top: 0, zIndex: 50,
        }}>
          <div style={{ flex: 1 }} />

          {/* Notificatiebel */}
          <div style={{ position: "relative" }}>
            <button
              onClick={() => nieuweVersie && setBellOpen(o => !o)}
              style={{
                width: 38, height: 38, borderRadius: "50%",
                background: T.inputBg, border: `1px solid ${T.border}`,
                display: "flex", alignItems: "center", justifyContent: "center",
                cursor: nieuweVersie ? "pointer" : "default", color: T.subtext, flexShrink: 0,
              }}>
              <svg width="17" height="17" viewBox="0 0 16 16" fill="none">
                <path d="M8 1.5A4.5 4.5 0 003.5 6v2.5L2 10h12l-1.5-1.5V6A4.5 4.5 0 008 1.5z" stroke="currentColor" strokeWidth="1.4"/>
                <path d="M6.5 12.5a1.5 1.5 0 003 0" stroke="currentColor" strokeWidth="1.4" strokeLinecap="round"/>
              </svg>
            </button>

            {/* Badge */}
            {nieuweVersie && (
              <div style={{
                position: "absolute", top: 1, right: 1,
                width: 13, height: 13, borderRadius: "50%",
                background: "#f97316", border: `2px solid ${T.sidebar ?? T.card}`,
                display: "flex", alignItems: "center", justifyContent: "center",
                fontSize: 7, fontWeight: 700, color: "#fff",
              }}>1</div>
            )}

            {/* Popup */}
            {bellOpen && nieuweVersie && (
              <>
                <div onClick={() => setBellOpen(false)} style={{ position: "fixed", inset: 0, zIndex: 190 }} />
                <div style={{
                  position: "absolute", right: 0, top: "calc(100% + 10px)",
                  zIndex: 200, width: 280,
                  background: T.popupBg, border: `1px solid ${T.border}`,
                  borderRadius: 14, padding: "16px 18px",
                  boxShadow: T.shadow,
                }}>
                  <div style={{ fontSize: 13, fontWeight: 700, color: T.text, marginBottom: 10 }}>
                    Meldingen
                  </div>
                  <div style={{
                    display: "flex", gap: 12, alignItems: "flex-start",
                    padding: "10px 12px", borderRadius: 10,
                    background: "rgba(249,115,22,0.08)", border: "1px solid rgba(249,115,22,0.2)",
                  }}>
                    <div style={{
                      width: 32, height: 32, borderRadius: "50%", flexShrink: 0,
                      background: "rgba(249,115,22,0.15)",
                      display: "flex", alignItems: "center", justifyContent: "center",
                    }}>
                      <svg width="15" height="15" viewBox="0 0 16 16" fill="none">
                        <path d="M8 1.5A4.5 4.5 0 003.5 6v2.5L2 10h12l-1.5-1.5V6A4.5 4.5 0 008 1.5z" stroke="#f97316" strokeWidth="1.4"/>
                        <path d="M6.5 12.5a1.5 1.5 0 003 0" stroke="#f97316" strokeWidth="1.4" strokeLinecap="round"/>
                      </svg>
                    </div>
                    <div>
                      <div style={{ fontSize: 13, fontWeight: 600, color: T.text, marginBottom: 2 }}>
                        Nieuwe versie beschikbaar
                      </div>
                      <div style={{ fontSize: 12, color: T.muted, lineHeight: 1.5 }}>
                        v{nieuweVersie.latest} is uitgebracht. Je gebruikt momenteel v{version}.
                      </div>
                      {/* De release-notes zelf staan hier niet: dat is Markdown
                          uit de changelog, en die kwam als ruwe `### `-koppen in
                          een smalle kolom te staan. Wie de details wil, volgt de
                          link naar de release. */}
                      {nieuweVersie.url && (
                        <a href={nieuweVersie.url} target="_blank" rel="noreferrer" style={{
                          display: "inline-block", marginTop: 8,
                          fontSize: 11, fontWeight: 700, color: "#f97316", textDecoration: "none",
                        }}>
                          Release bekijken →
                        </a>
                      )}
                    </div>
                  </div>
                </div>
              </>
            )}
          </div>


          {/* Gebruikersprofiel */}
          <div style={{ position: "relative", flexShrink: 0 }}>
            <button onClick={() => setProfielOpen((o) => !o)} style={{
              display: "flex", alignItems: "center", gap: 10,
              background: "transparent", border: "none",
              borderRadius: 12, cursor: "pointer", padding: "4px 8px 4px 4px",
              transition: "background 0.15s",
            }}
            onMouseEnter={e => e.currentTarget.style.background = T.inputBg}
            onMouseLeave={e => e.currentTarget.style.background = "transparent"}
            >
              <div style={{
                width: 36, height: 36, borderRadius: "50%", overflow: "hidden", flexShrink: 0,
                background: avatar ? "transparent" : "linear-gradient(135deg, #7c3aed, #a855f7)",
                display: "flex", alignItems: "center", justifyContent: "center",
                fontSize: 12, fontWeight: 800, color: "#fff",
                border: `2px solid ${T.border}`,
              }}>
                {avatar
                  ? <img src={avatar} alt="avatar" style={{ width: "100%", height: "100%", objectFit: "cover" }} />
                  : initials(currentUser?.naam || "")
                }
              </div>
              <div style={{ textAlign: "left" }}>
                <div style={{ fontSize: 13, fontWeight: 600, color: T.text, whiteSpace: "nowrap", lineHeight: 1.3 }}>
                  {currentUser?.naam || "Gebruiker"}
                </div>
                <div style={{ fontSize: 11, color: T.muted, whiteSpace: "nowrap", lineHeight: 1.3 }}>
                  {currentUser?.email || ""}
                </div>
              </div>
              <svg width="12" height="12" viewBox="0 0 10 10" fill="none" style={{ flexShrink: 0, color: T.muted }}>
                <polyline points="1,3 5,7 9,3" stroke="currentColor" strokeWidth="1.8" strokeLinecap="round" strokeLinejoin="round"/>
              </svg>
            </button>
            {profielOpen && <ProfielPopup onClose={() => setProfielOpen(false)} />}
          </div>
        </div>

        {/* Vergrendeld banner */}
        {locked && (
          <div style={{
            position: "sticky", top: 16, zIndex: 150,
            margin: "16px auto 0", maxWidth: 400,
            background: "rgba(239,68,68,0.15)",
            border: "1px solid rgba(239,68,68,0.4)",
            borderRadius: 99, padding: "8px 20px",
            display: "flex", alignItems: "center", gap: 8,
            backdropFilter: "blur(8px)",
          }}>
            <span style={{ fontSize: 14 }}>🔒</span>
            <span style={{ fontSize: 13, color: RED, fontWeight: 600 }}>
              Vergrendeld — ga naar Gebruikers om te ontgrendelen
            </span>
          </div>
        )}

        {/* Modals */}
        {showUsers       && <GebruikersBeheer   onClose={() => setShowUsers(false)} />}
        {showInstellingen && <InstellingenModal  onClose={() => setShowInstellingen(false)} />}

        {/* Actieve pagina */}
        <div style={{ maxWidth: 1200, margin: "0 auto", padding: "28px 24px" }}>
          <ActivePage />
        </div>
      </div>
    </div>
  );
}

export default function App() {
  return (
    <AppProvider>
      <AppInner />
    </AppProvider>
  );
}